Electricity and Magnetism Answers

In a Digital multimeter what will be voltage reading if we connect both terminals to each other (in voltage mode or resistance mode).

MAGNETIC FIELD CAN BE GENERATED BY AN ELECTRIC CURRENT

8. a) A wire loop of resistance 10 and radius 10 cm is kept in the plane of this

paper in a uniform magnetic field . B 

The direction of B 

is perpendicular to the

plane of the page and points out of it and its magnitude is increasing at the rate

of 0.50Ts . 1 Determine the magnitude and direction of the induced current in the

loop.

The magnetic flux density at the centre 100 loop circular coil of 15cm diameter can be the same as to the magnetic flux density at the end of a 200 turns 500cm long solenoid with a current of 3A. estimate the magnitude of current that must flow through circular coil for this to happen (Take permeability of the free space as 4π × 10–7 H/M

Determine the dipole moment of the system “electron – nucleus” of a hydrogen atom considering this atom as a dipole. Distance between the electron and the nucleus is l=10^-8 cm.

A particle of charge 3 x 〖10〗^(-9) C is located at point (0, 0) in a certain coordinate system. Assuming all lengths are in meters, calculate the potential at the following points A (3, 3) and B (0, 2). How much work is needed to take a particle of charge 2 x 〖10〗^(-9) C from point A to point B?

Two spheres, P and Q with charges of +4 microcoulomb and -6 microcoulomb are brought into contact and separated again.

What is the charge on each sphere after contact?

An interesting (but oversimplified) model of an atom pictures an electron “in orbit” around a proton. Suppose this electron is moving in a circular orbit of radius 0.10 nm (1.0 x 10-10) and the force that makes this circular motion possible is the electric force exerted by the proton on the electron. Find the speed of the electron.

cubical gaussian surface has an electric dipole of equal size put opposite signs separated by a distance 1 at its geometric center .The total electric flux of all six faces of the cube is.....?